Build (method = -2) #dp: 416 Step-3' Graph: 31 vertices and 172 arcs (0.00s) Step-4' Graph: 25 vertices and 160 arcs (0.00s) #V4/#V3 = 0.81 #A4/#A3 = 0.93 Ready! (0.00s) Optimize a model with 64 rows, 161 columns and 437 nonzeros Presolve removed 30 rows and 30 columns Presolve time: 0.00s Presolved: 34 rows, 131 columns, 328 nonzeros Variable types: 0 continuous, 131 integer (61 binary) Found heuristic solution: objective 41.0000000 Found heuristic solution: objective 39.0000000 Optimize a model with 34 rows, 131 columns and 328 nonzeros Presolved: 34 rows, 131 columns, 328 nonzeros Root barrier log... Ordering time: 0.00s Barrier statistics: AA' NZ : 1.760e+02 Factor NZ : 4.870e+02 Factor Ops : 8.501e+03 (less than 1 second per iteration) Threads : 1 Objective Residual Iter Primal Dual Primal Dual Compl Time 0 2.19772069e+02 -3.54470206e+02 2.31e+02 1.26e-01 8.26e+00 0s 1 6.95499745e+01 -9.54591931e+01 1.48e+01 4.44e-16 9.33e-01 0s 2 4.41012960e+01 9.52060414e+00 1.22e+00 4.44e-16 1.44e-01 0s 3 3.62465997e+01 2.20207810e+01 9.96e-02 2.64e-16 5.42e-02 0s 4 3.26314593e+01 2.88271280e+01 9.74e-03 3.43e-16 1.44e-02 0s 5 3.13729477e+01 3.07068190e+01 3.18e-03 4.44e-16 2.52e-03 0s 6 3.10983045e+01 3.09084154e+01 5.33e-04 3.19e-16 7.15e-04 0s 7 3.10192612e+01 3.09824215e+01 1.19e-04 2.47e-16 1.39e-04 0s 8 3.10005838e+01 3.09964070e+01 8.64e-08 1.47e-16 1.57e-05 0s 9 3.10000000e+01 3.10000000e+01 1.95e-12 2.22e-16 1.42e-10 0s 10 3.10000000e+01 3.10000000e+01 5.68e-14 2.80e-16 1.42e-13 0s Barrier solved model in 10 iterations and 0.00 seconds Optimal objective 3.10000000e+01 Root relaxation: objective 3.100000e+01, 23 iterations, 0.00 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time * 0 0 0 31.0000000 31.00000 0.0% - 0s Explored 0 nodes (23 simplex iterations) in 0.01 seconds Thread count was 1 (of 8 available processors) Optimal solution found (tolerance 0.00e+00) Best objective 3.100000000000e+01, best bound 3.100000000000e+01, gap 0.0% Preprocessing time: 0.01 seconds Gurobi run time: 0.01 seconds Total run time: 0.01 seconds Objective: 31 Solution: 1 x [39] 1 x [38] 1 x [37] 1 x [36] 1 x [35] 1 x [34] 1 x [33] 1 x [32] 2 x [31] 1 x [30] 2 x [29] 1 x [3, 28] 2 x [4, 27] 1 x [5, 26] 1 x [7, 25] 1 x [9, 24] 1 x [8, 23] 2 x [7, 22] 2 x [6, 21] 1 x [5, 20] 1 x [10, 19] 1 x [11, 18] 1 x [13, 17] 1 x [12, 17] 1 x [1, 2, 16] 1 x [14, 15]